simplify code and fix advice ... in 24
Merge pull request #46 from Floobits/delete-file-advice

simplify code and fix advice ... in 24 (we are dropping 23 support)
added instructions for el-get
Merge pull request #47 from deanmalmgren/el-get

added instructions for el-get
fix KeyError
end-of-buffer should not be used because it spams 'mark set'
don't move point unless we have to do so for highlights